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我创建了一个Facebook登录活动，我没有得到任何编译器错误，但是当我在设备上安装应用程序开不开，说不幸的是应用程序已停止工作......Android：应用程序崩溃在启动由于Facebook登录？
这里的主要活动：
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity{
private MainFragment mainFragment;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
if (savedInstanceState == null) {
// Add the fragment on initial activity setup
mainFragment = new MainFragment();
getSupportFragmentManager()
.beginTransaction()
.add(android.R.id.content, mainFragment)
.commit();
} else {
// Or set the fragment from restored state info
mainFragment = (MainFragment) getSupportFragmentManager()
.findFragmentById(android.R.id.content);
}
}
}
这里的主要片段：
import com.facebook.SessionState;
import com.facebook.Session;
import com.facebook.UiLifecycleHelper;
import com.facebook.widget.LoginButton;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.app.Fragment;
public class MainFragment extends Fragment{
private static final String TAG = "MainFragment";
private UiLifecycleHelper uiHelper;
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.main, container, false);
LoginButton authButton = (LoginButton) view.findViewById(R.id.authButton);
authButton.setFragment(this);
return view;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
uiHelper = new UiLifecycleHelper(getActivity(), callback);
uiHelper.onCreate(savedInstanceState);
}
private void onSessionStateChange(Session session, SessionState state, Exception exception) {
if (state.isOpened()) {
Log.i(TAG, "Logged in...");
} else if (state.isClosed()) {
Log.i(TAG, "Logged out...");
}
}
private Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state, Exception exception) {
onSessionStateChange(session, state, exception);
}
};
@Override
public void onResume() {
super.onResume();
Session session = Session.getActiveSession();
if (session != null &&
(session.isOpened() || session.isClosed())) {
onSessionStateChange(session, session.getState(), null);
}
uiHelper.onResume();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uiHelper.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onPause() {
super.onPause();
uiHelper.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
uiHelper.onDestroy();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
uiHelper.onSaveInstanceState(outState);
}
}
这里的清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.changedthis.app"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion = "2"
android:targetSdkVersion= "3"
android:maxSdkVersion = "4" />
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/appid"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.facebook.MainActivity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
这里的logcat的：
02-27 14:51:46.065: E/AndroidRuntime(20554): FATAL EXCEPTION: main
02-27 14:51:46.065: E/AndroidRuntime(20554): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.joshuaphilpott.studybuddy/com.facebook.MainActivity}: java.lang.ClassNotFoundException: Didn't find class "com.facebook.MainActivity" on path: /data/app/com.joshuaphilpott.studybuddy-1.apk
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2229)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2359)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread.access$700(ActivityThread.java:165)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1326)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.os.Handler.dispatchMessage(Handler.java:99)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.os.Looper.loop(Looper.java:137)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread.main(ActivityThread.java:5455)
02-27 14:51:46.065: E/AndroidRuntime(20554): at java.lang.reflect.Method.invokeNative(Native Method)
02-27 14:51:46.065: E/AndroidRuntime(20554): at java.lang.reflect.Method.invoke(Method.java:525)
02-27 14:51:46.065: E/AndroidRuntime(20554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
02-27 14:51:46.065: E/AndroidRuntime(20554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
02-27 14:51:46.065: E/AndroidRuntime(20554): at dalvik.system.NativeStart.main(Native Method)
02-27 14:51:46.065: E/AndroidRuntime(20554): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.facebook.MainActivity" on path: /data/app/com.joshuaphilpott.studybuddy-1.apk
02-27 14:51:46.065: E/AndroidRuntime(20554): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:64)
02-27 14:51:46.065: E/AndroidRuntime(20554): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
02-27 14:51:46.065: E/AndroidRuntime(20554): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
02-27 14:51:46.065: E/AndroidRuntime(20554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2220)
02-27 14:51:46.065: E/AndroidRuntime(20554): ... 11 more
粘贴logcat的 –
LogcatNotFoundError？ – donfuxx